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Finding the Third Proportional to 4,978 and 7,508

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Solution

The third proportional to 4,978 and 7,508 is: 11,323.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978 : 7,508 = 7,508 : x
  2. Step 2: Convert to fraction form
    4,978/7,508 = 7,508/x
  3. Step 3: Cross multiply
    4,978x = 7,508 × 7,508
  4. Step 4: Simplify right side
    4,978x = 56,370,064
  5. Step 5: Solve for x
    x = 56,370,064/4,978
  6. Step 6: Final answer
    x = 11,323.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.